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A053815 Floor(n / (sum of proper divisors of n)). 1

%I

%S 2,3,1,5,1,7,1,2,1,11,0,13,1,1,1,17,0,19,0,1,1,23,0,4,1,2,1,29,0,31,1,

%T 2,1,2,0,37,1,2,0,41,0,43,1,1,1,47,0,6,1,2,1,53,0,3,0,2,1,59,0,61,1,1,

%U 1,3,0,67,1,2,0,71,0,73,1,1,1,4,0,79,0

%N Floor(n / (sum of proper divisors of n)).

%H Charles R Greathouse IV, <a href="/A053815/b053815.txt">Table of n, a(n) for n = 2..10000</a>

%t Table[Floor[n/(DivisorSigma[1,n]-n)],{n,2,80}] (* _Harvey P. Dale_, Nov 16 2017 *)

%o (PARI) a(n)=n\(sigma(n)-n) \\ _Charles R Greathouse IV_, Mar 11 2014

%Y Cf. A001065.

%K nonn

%O 2,1

%A _Henry Bottomley_, Mar 28 2000

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Last modified February 5 23:07 EST 2023. Contains 360091 sequences. (Running on oeis4.)